X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2Fposix%2FSelect.c;h=3c87fbdc70ee66ec16024f4abfb03f6b9022f721;hb=7d9eb2e45b4a9ff4cb053b1ec37602be88528b62;hp=46db4054bb6917eba1d45d9abd5ae02d6830ac95;hpb=a2a67cd520b9841114d69a87a423dabcb3b4368e;p=ghc-hetmet.git

diff --git a/rts/posix/Select.c b/rts/posix/Select.c
index 46db405..3c87fbd 100644
--- a/rts/posix/Select.c
+++ b/rts/posix/Select.c
@@ -17,6 +17,10 @@
 #include "Select.h"
 #include "AwaitEvent.h"
 
+# ifdef HAVE_SYS_SELECT_H
+#  include <sys/select.h>
+# endif
+
 # ifdef HAVE_SYS_TYPES_H
 #  include <sys/types.h>
 # endif
@@ -59,10 +63,6 @@ wakeUpSleepingThreads(lnat ticks)
 
     while (sleeping_queue != END_TSO_QUEUE) {
 	tso = sleeping_queue;
-        if (tso->what_next == ThreadRelocated) {
-            sleeping_queue = tso->_link;
-            continue;
-        }
         if (((long)ticks - (long)tso->block_info.target) < 0) {
             break;
         }
@@ -77,6 +77,13 @@ wakeUpSleepingThreads(lnat ticks)
     return flag;
 }
 
+static void GNUC3_ATTRIBUTE(__noreturn__)
+fdOutOfRange (int fd)
+{
+    errorBelch("file descriptor %d out of range for select (0--%d).\nRecompile with -threaded to work around this.", fd, (int)FD_SETSIZE);
+    stg_exit(EXIT_FAILURE);
+}
+
 /* Argument 'wait' says whether to wait for I/O to become available,
  * or whether to just check and return immediately.  If there are
  * other threads ready to run, we normally do the non-waiting variety,
@@ -152,8 +159,8 @@ awaitEvent(rtsBool wait)
 	case BlockedOnRead:
 	  { 
 	    int fd = tso->block_info.fd;
-	    if (fd >= (int)FD_SETSIZE) {
-		barf("awaitEvent: descriptor out of range");
+	    if ((fd >= (int)FD_SETSIZE) || (fd < 0)) {
+                fdOutOfRange(fd);
 	    }
 	    maxfd = (fd > maxfd) ? fd : maxfd;
 	    FD_SET(fd, &rfd);
@@ -163,8 +170,8 @@ awaitEvent(rtsBool wait)
 	case BlockedOnWrite:
 	  { 
 	    int fd = tso->block_info.fd;
-	    if (fd >= (int)FD_SETSIZE) {
-		barf("awaitEvent: descriptor out of range");
+	    if ((fd >= (int)FD_SETSIZE) || (fd < 0)) {
+                fdOutOfRange(fd);
 	    }
 	    maxfd = (fd > maxfd) ? fd : maxfd;
 	    FD_SET(fd, &wfd);
@@ -248,11 +255,7 @@ awaitEvent(rtsBool wait)
 	  for(tso = blocked_queue_hd; tso != END_TSO_QUEUE; tso = next) {
 	      next = tso->_link;
 
-              if (tso->what_next == ThreadRelocated) {
-                  continue;
-              }
-
-	      switch (tso->why_blocked) {
+              switch (tso->why_blocked) {
 	      case BlockedOnRead:
 		  ready = unblock_all || FD_ISSET(tso->block_info.fd, &rfd);
 		  break;
@@ -290,3 +293,4 @@ awaitEvent(rtsBool wait)
 }
 
 #endif /* THREADED_RTS */
+